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psbt: handle 'NULL' or empty byte PSBTs

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Don't crash if the PSBT is null / zero-byte len.
This commit is contained in:
niftynei 2020-08-06 13:17:47 -05:00 • committed by Rusty Russell
parent ef3fbab551
commit 10237ccb8e
1 changed files with 1 additions and 1 deletions
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2
bitcoin/psbt.c
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@ -742,7 +742,7 @@ struct wally_psbt *fromwire_wally_psbt(const tal_t *ctx,
psbt_byte_len = fromwire_u32(cursor, max);
psbt_buf = fromwire(cursor, max, NULL, psbt_byte_len);
if (!psbt_buf)
if (!psbt_buf || psbt_byte_len == 0)
return NULL;
psbt = psbt_from_bytes(ctx, psbt_buf, psbt_byte_len);